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I have an 9 year old Range Tribune HE unvented cylinder thermostat connected to a Vaillant VR66 using the cylinder thermostat terminal but when the thermostat is closed there is a 12v signal registering (Vaillant say it should be 0v.) which is causing the boiler to keep firing and hold the hot...

I've had a Vaillant ecoTec 637 fitted and I specified the commercial Valliant weather compensation upon Vaillant's advice. My house has a normal S plan system but has two Range Tribune HW cylinders so the domestic version couldn't be used. (according to Vaillant) However when the electrician...

My house has a HW cylinders at each end and I want to fit a Vaillant system boiler with full weather compensation but the control centres they do don't have connections for two lots of HW sensors and motorised valves. Any one know how to do it? Thanks

I've been trying find a programmable theromstat with a better than 0.5 C differential. My present ones if set to 19.5 C, rise to 20.1 C then turn off and come back on at 18.4 C This gives too long on and off periods with the temperature being too hot then too cold. Thanks. Roy

There is a restaurant in Burgess Hill that has had solid oak square edged boards nailed to joists over underfloor heating for so long I can't remember, but over 12 years at least. I'm considering doing the same as I like the floor very much. Does anybody have any experience of this type...

The instructions for my Circulating Pumps Ltd pump on my underfloor system say to use 3x0.75 core cable with rubber insulation rated at 110 C. minimum. All the cable I can find though in the suppliers I've looked at is rated at 85/90 C. Anyone know where I can get higher heat resistant rated...